Question

2.24 cm3

of a triatomic elementary gas was found to be weighing 4.8 mg at STP. What is the

atomic mass of the gas.​

Answer 1

Answer:

n=0.01 mol

0.01 mol of gas contains 1g.

1mol of gas =100g

Therefore, 6.022×10

23

×3 atoms=100 g

Mass of one atom =5.53×10

−23

g